Question

Problem 4.41

Write balanced molecular and net ionic equations for the following reactions, and identify the gas formed in each.

Part A

Solid cadmium sulfide reacts with an aqueous solution of sulfuric acid .

Express your answer as a balanced chemical equation. Identify all of the phases in your answer.

CdS(s)+H2SO4(aq)→CdSO4(aq)+H2S(aq)

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Incorrect; Try Again

Part B

Ionic equation:

Express your answer as a balanced net ionic equation. Identify all of the phases in your answer.

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Part C

Identify the gas formed in this equation.

HS

CdS

CdSO4

H2S

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Correct

Part D

Solid magnesium carbonate reacts with an aqueous solution of perchloric acid.

Express your answer as a balanced chemical equation. Identify all of the phases in your answer.

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Part E

Ionic equation:

Express your answer as a balanced net ionic equation. Identify all of the phases in your answer.

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Answer 1

A)
Molecular equation:
CdS(s) + H2SO4(aq) --> CdSO4 (aq) + H2S (g)

B)
Total ionic equation:
CdS (s) + 2H+ (aq) + SO42- (aq) -----> Cd2+ (aq) + SO42- (aq) + H2S (g)

Net ionic equation:
CdS (s) + 2H+ (aq) -----> Cd2+ (aq) + H2S (g)

C)
H2S is the gas

D)
molecular equation:
MgCO3(s) + 2 HClO4(aq) = Mg(ClO4)2(aq) + H2O(l) + CO2(g)

E)
Total ionic equation is:
MgCO3(s) + 2H+(aq) + 2ClO4-(aq) --> Mg2+(aq) + 2ClO4-(aq) + H2O(l) + CO2(g)
ionic equation is:
MgCO3(s) + 2H+(aq) = Mg2+(aq) + H2O(l) + CO2(g)